Cut-out switch.



L. KOVACS.

CUT-OUT SWITCH.

APPLICATION FILED 001.3111911.

A1,049,237 1 Patented J an. 7, 1913.

2 SHEETSYSHBET 1.

ArraA/fy L. KOVACS.

GUT-OUT SWITCH.

APPLICATION IILBD 00T.30, 1911.

1,049,371. Patented Jan.7,1913.

z SHEETS-sanm- 2.

UNITED sTATEsjPATENT oFFioE.

LOUIS KOVACS, OF CHICAGO, ILLINOIS.

CUT-OUT SWITCH.

To alt 'whom it may concern.' l u `Be it known that I, Louis KovA/Cs, a subject of the-Emperor of Austria-Hungary, residing at Chicago, in the county of Cook and State of Illinois, have vinvented anew and useful Improvement in Cut- Out Switches, of which the following is a complete specification. f,

The main objects of this invention are to provide an improved cut-outswitch.; to` provide an improved constructionl adapted to prevent a gijeater currentl passing through the wire attached to the fuse than that called for by the wire rating; to provide a cut-out switch in whichit is impossible to connect 'a fuse for less current strength than the capacity or rating of the wire leadingv to the cut-out; and to provide a cheap, simple and durable'device` adapted to perform its work with greateiiiciency. Y

The invention consists ofthe matters hereinafter described'in the specification and i more fully pointed out and defined in the appended claims.

In the drawings: Fi tion of a cut-out an ure 1 is a side elevafuse for a cut-out .switch embodied in this invention, and showing one mea-ns for securing the cut-out socketto the fuse plug. Fig. 2 is a plan .insulating piece or body view of the cut-out switch, with one of the cut-outs and fuses in longitudinal section. Fig. 3 is longitudinal sectionof the switch taken at ri ht angles to the section shown in Fig. 2. gFig. 4 is a view of the cut-out partly in section and partly in side elevation, with a contact for a given ampera e. Fig. 5 is a longitudinal sectionof the use plug with a 'contact of less amperage than that of'the cut-outl shown in Fig. 4 and showing that it is impossible lto connect the two contacts. Fig. 6 is a longitudinal section of the cut-out showing the contact marked toindicate the different lengths of the contact required to carry various numbers of am- .peres within a given wire rating.-"'Fig. 7 is a similar view of. the fuse plug showing..

the contact marked to indicate diierent lengths'of contact to correspond with that of the cut-out. elevation partly in section of the switch blade. Fig. 9 is a top plan view of the outer for the fuse plug. Fig. 10 is a central srction of said insulating 'Specification ufl-:Letters Patent. l vApplication tiled October 30, 1911. Serial No. 657,499.

Fig. 8 is an enlarged side' Patented Janqgiars.

piece. *.Fig. 11 is a bottom lan view of the same.

Fig. 14 is a bottom plate in section and illustrating the different lengths of contact required for various numbers of amperes within a given wire rating.

In the drawings: The cut-out 1 comprises a cup shaped shell or socket 2, of brass or copper, which is provided on its bottom with an ear 3 adapted to be hinged Ato ears 4 on a switch base-5. I/Vithin the shell 2, and secured to the bottom axially thereof, is the contact guide socket 6 Aof copper. An inverted lcup shaped contact-support 7 is carried in the inner portion of the shell 2 and is provided in its sides with guide grooves 8 into which projectl guide screws 9 carried in the Walls of the shell 2 vand which permit the contact support to move longitudinally .of the shell but hold it from rotation therein. A coiled spring 10 bears at one end on the bottom of the shell 2 and at its other end against the bottom-of the contact support 7 and normally acts to hold said Support at the outward limit of its movementinthe shell. rI `he cut-out contact 11 has a reduced inner end which extends through an aperture in the support and is threaded to receive the binding nuts 12 on the inner side of the support which holds said contact in place, while the extreme inner end of the Contact extends into the guide socket 6 and forms an electrical connection therewith.

y The fuse plug comprises an outer insulating piece or body 13 and an inner insulating plug is adapted to be used for a single rated current strength only, but it is impossible to use a safety plug designed for a given amerage in conjunction with a fuse designed or another amperage.

I claim as my invention:

l. A device of the character described, comprising a cut-out shell, a yielding contact support in the shell, a cut-out contact mounted upon said support, a fuse plug, a fuse contact in the fuse plug, a fuse connected with the fuse contact, and a switch blade connected with the fuse, the length of each of said contacts being proportional to the amperage at which said fuse is adapted to blow out.

2. A device of the character described, comprising a cut-out shell, a movable 4contact support therein, resilient means "normally to hold the contact support at the outer limit of its movement, a cut-out contact mounted upon said support, a fuse lug, a fuse contact carried in the plug and a apted to engage the cut-out contact, a fuse connected with the fuse contact, and a switch blade connected with the fuse.

3. A device of the character described, comprising a cut-out and a fuse, co-actihg contact members in the cut-out and in the fuse, the length of each of said 'members being determined by the amperage, a switch blade, and a -fuse intermediate said blade and one of said contacts.

4. A device of the character described comprising a cut-out shell in hinged relation to the swltch base, a cartridge adapted to co-act with said shell, a switch-blade connected to said cartridge, co-acting contact members in said` shell and in said plug, and a fuse intermediate one of said contact members and the blade, the length of each of said contact members being proportioned to he amperage which can be carried by said use.

5. In a device of the character described, the combination of a cut-out shell adapted to be hinged to a switch base, a cartridge adapted to be connected therewith, a .switchblade connected to said cartridge, co-actin contact members in said shell and in sai cartridge, a fuse intermediate said blade and one of said contact members, conducting members fixed in said cartridge and in said shell, the sum of the lengths of said co-acting contact members being sufficient to bridge the space between said fixed conductor members.

LOUIS KOVACS.

Witnesses JOSEPH SCHLENKER, RoBT. KLo'rz. 

